Kalki Venkatesh
Lead Backend Engineer | Node.js, Express.js, Python, Django | SaaS Architecture | REST APIs | AWS | WhatsApp & Meta API Integrations
Hyderabad
kalkivenkateshdonga@gmail.com
I'm a Lead Backend Engineer with 4+ years of experience building scalable SaaS platforms, cloud infrastructure, and production-ready backend systems. At PhotonX Technologies, I lead backend development for WeNext, a multi-tenant automation platform handling 50K+ messages daily. My work spans system architecture, Meta and WhatsApp integrations, asynchronous processing, database optimization, and AWS deployments. I enjoy solving complex engineering challenges, building reliable systems, and turning product ideas into scalable solutions. I'm particularly interested in SaaS architecture, AI-powered automation, and cloud-native development.
Lead Backend Engineer
PhotonX Technologies Pvt. Ltd.
- Architected WeNext’s multi-tenant SaaS backend, supporting 10+ enterprise clients on a shared platform.
- Implemented WhatsApp Cloud API Coexistence, Embedded Signup, and real-time webhooks, processing 50K+ messages daily.
- Deployed AWS infrastructure using EC2, RDS, and S3, achieving 99.9% uptime.
- Improved development productivity by integrating AI-assisted tools such as Cursor and Claude Code.
- Contributed to React and Flutter development and coordinated Meta WhatsApp integration compliance.
Backend Developer
Vibho Technologies Pvt. Ltd.
- Developed HRMS backend APIs for employee management, attendance, payroll, and support ticketing across three client deployments.
- Built food delivery APIs for restaurant listings, menus, carts, and order management.
- Integrated Meta Cloud APIs to develop a WhatsApp political campaign bot supporting outreach to 10,000+ voters.
Backend Developer
Presentience Technologies
- Developed REST APIs using Django, Django REST Framework, and Node.js for e-commerce and educational platforms.
- Improved database query performance by up to 3x through schema redesign and indexing.
- Implemented backend functionality for product catalogs, order management, and user authentication across 4+ client projects.
WeNext — WhatsApp Business & Social Media Automation Platform
Developed scalable SaaS features for WhatsApp automation, bulk messaging, Meta Embedded Signup, WhatsApp Coexistence, and real-time webhook processing. Built Instagram automation workflows, scheduled publishing, AI-powered comment and DM replies, and e-commerce integrations.
One Smart World — Psychometric Assessment SaaS Backend
Designed and developed a scalable REST API backend for a psychometric assessment platform. Implemented role-based access control, assessment scoring, Z-score calculations, percentile rankings, Stripe payments, automated PDF reports, and API documentation.
Rozana — Quick Commerce Management System
Developed backend services for product catalog management, multi-level categories, product variants, facility-specific pricing, GST calculations, price history tracking, and bulk import/export workflows.
Bachelor of Technology (B.Tech)
GIET Engineering College
Diploma
VISIT Engineering College
Attendee · Oct 24, 2026